src/CutAndPaste.cpp

   1 /**
   2  * \file CutAndPaste.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Jürgen Vigna
   7  * \author Lars Gullik Bjønnes
   8  * \author Alfredo Braunstein
   9  * \author Michael Gerz
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "CutAndPaste.h"
  17
  18 #include "BaseClassList.h"
  19 #include "Buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "BufferParams.h"
  22 #include "BufferView.h"
  23 #include "Changes.h"
  24 #include "Cursor.h"
  25 #include "ErrorList.h"
  26 #include "FuncRequest.h"
  27 #include "InsetIterator.h"
  28 #include "InsetList.h"
  29 #include "Language.h"
  30 #include "lfuns.h"
  31 #include "LyXFunc.h"
  32 #include "LyXRC.h"
  33 #include "Text.h"
  34 #include "Paragraph.h"
  35 #include "paragraph_funcs.h"
  36 #include "ParagraphParameters.h"
  37 #include "ParIterator.h"
  38 #include "Undo.h"
  39
  40 #include "insets/InsetFlex.h"
  41 #include "insets/InsetGraphics.h"
  42 #include "insets/InsetGraphicsParams.h"
  43 #include "insets/InsetTabular.h"
  44
  45 #include "mathed/MathData.h"
  46 #include "mathed/InsetMath.h"
  47 #include "mathed/MathSupport.h"
  48
  49 #include "support/debug.h"
  50 #include "support/docstream.h"
  51 #include "support/gettext.h"
  52 #include "support/limited_stack.h"
  53 #include "support/lstrings.h"
  54
  55 #include "frontends/Clipboard.h"
  56 #include "frontends/Selection.h"
  57
  58 #include <boost/tuple/tuple.hpp>
  59 #include <boost/next_prior.hpp>
  60
  61 #include <string>
  62
  63 using namespace std;
  64 using namespace lyx::support;
  65 using lyx::frontend::Clipboard;
  66
  67 namespace lyx {
  68
  69 namespace {
  70
  71 typedef pair<pit_type, int> PitPosPair;
  72
  73 typedef limited_stack<pair<ParagraphList, DocumentClass const *> > CutStack;
  74
  75 CutStack theCuts(10);
  76 // persistent selection, cleared until the next selection
  77 CutStack selectionBuffer(1);
  78
  79 // store whether the tabular stack is newer than the normal copy stack
  80 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  81 // when we (hopefully) have a one-for-all paste mechanism.
  82 bool dirty_tabular_stack_ = false;
  83
  84
  85 void region(CursorSlice const & i1, CursorSlice const & i2,
  86         Inset::row_type & r1, Inset::row_type & r2,
  87         Inset::col_type & c1, Inset::col_type & c2)
  88 {
  89         Inset & p = i1.inset();
  90         c1 = p.col(i1.idx());
  91         c2 = p.col(i2.idx());
  92         if (c1 > c2)
  93                 swap(c1, c2);
  94         r1 = p.row(i1.idx());
  95         r2 = p.row(i2.idx());
  96         if (r1 > r2)
  97                 swap(r1, r2);
  98 }
  99
 100
 101 bool checkPastePossible(int index)
 102 {
 103         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 104 }
 105
 106
 107 pair<PitPosPair, pit_type>
 108 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 109                      DocumentClass const * const docclass, ErrorList & errorlist)
 110 {
 111         Buffer const & buffer = cur.buffer();
 112         pit_type pit = cur.pit();
 113         pos_type pos = cur.pos();
 114         ParagraphList & pars = cur.text()->paragraphs();
 115
 116         if (parlist.empty())
 117                 return make_pair(PitPosPair(pit, pos), pit);
 118
 119         BOOST_ASSERT (pos <= pars[pit].size());
 120
 121         // Make a copy of the CaP paragraphs.
 122         ParagraphList insertion = parlist;
 123         DocumentClass const * const tc = buffer.params().documentClassPtr();
 124
 125         // Now remove all out of the pars which is NOT allowed in the
 126         // new environment and set also another font if that is required.
 127
 128         // Convert newline to paragraph break in ERT inset.
 129         // This should not be here!
 130         Inset * inset = pars[pit].inInset();
 131         if (inset && (inset->lyxCode() == ERT_CODE ||
 132                         inset->lyxCode() == LISTINGS_CODE)) {
 133                 for (size_t i = 0; i != insertion.size(); ++i) {
 134                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 135                                 if (insertion[i].isNewline(j)) {
 136                                         // do not track deletion of newline
 137                                         insertion[i].eraseChar(j, false);
 138                                         breakParagraphConservative(
 139                                                         buffer.params(),
 140                                                         insertion, i, j);
 141                                 }
 142                         }
 143                 }
 144         }
 145
 146         // set the paragraphs to empty layout if necessary
 147         // note that we are doing this if the empty layout is
 148         // supposed to be the default, not just if it is forced
 149         if (cur.inset().useEmptyLayout()) {
 150                 LayoutPtr const layout =
 151                         buffer.params().documentClass().emptyLayout();
 152                 ParagraphList::iterator const end = insertion.end();
 153                 for (ParagraphList::iterator par = insertion.begin();
 154                                 par != end; ++par)
 155                         par->setLayout(layout);
 156         }
 157
 158         // Make sure there is no class difference.
 159         InsetText in;
 160         // This works without copying any paragraph data because we have
 161         // a specialized swap method for ParagraphList. This is important
 162         // since we store pointers to insets at some places and we don't
 163         // want to invalidate them.
 164         insertion.swap(in.paragraphs());
 165         cap::switchBetweenClasses(docclass, tc, in, errorlist);
 166         insertion.swap(in.paragraphs());
 167
 168         ParagraphList::iterator tmpbuf = insertion.begin();
 169         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 170
 171         depth_type max_depth = pars[pit].getMaxDepthAfter();
 172
 173         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 174                 // If we have a negative jump so that the depth would
 175                 // go below 0 depth then we have to redo the delta to
 176                 // this new max depth level so that subsequent
 177                 // paragraphs are aligned correctly to this paragraph
 178                 // at level 0.
 179                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 180                         depth_delta = 0;
 181
 182                 // Set the right depth so that we are not too deep or shallow.
 183                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 184                 if (tmpbuf->params().depth() > max_depth)
 185                         tmpbuf->params().depth(max_depth);
 186
 187                 // Only set this from the 2nd on as the 2nd depends
 188                 // for maxDepth still on pit.
 189                 if (tmpbuf != insertion.begin())
 190                         max_depth = tmpbuf->getMaxDepthAfter();
 191
 192                 // Set the inset owner of this paragraph.
 193                 tmpbuf->setInsetOwner(pars[pit].inInset());
 194                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 195                         // do not track deletion of invalid insets
 196                         if (Inset * inset = tmpbuf->getInset(i))
 197                                 if (!pars[pit].insetAllowed(inset->lyxCode()))
 198                                         tmpbuf->eraseChar(i--, false);
 199                 }
 200
 201                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 202                                          Change::INSERTED : Change::UNCHANGED));
 203         }
 204
 205         bool const empty = pars[pit].empty();
 206         if (!empty) {
 207                 // Make the buf exactly the same layout as the cursor
 208                 // paragraph.
 209                 insertion.begin()->makeSameLayout(pars[pit]);
 210         }
 211
 212         // Prepare the paragraphs and insets for insertion.
 213         // A couple of insets store buffer references so need updating.
 214         insertion.swap(in.paragraphs());
 215
 216         ParIterator fpit = par_iterator_begin(in);
 217         ParIterator fend = par_iterator_end(in);
 218
 219         for (; fpit != fend; ++fpit) {
 220                 InsetList::const_iterator it = fpit->insetList().begin();
 221                 InsetList::const_iterator et = fpit->insetList().end();
 222                 for (; it != et; ++it)
 223                                 it->inset->setBuffer(const_cast<Buffer &>(buffer));
 224         }
 225         insertion.swap(in.paragraphs());
 226
 227         // Split the paragraph for inserting the buf if necessary.
 228         if (!empty)
 229                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 230
 231         // Paste it!
 232         if (empty) {
 233                 pars.insert(boost::next(pars.begin(), pit),
 234                             insertion.begin(),
 235                             insertion.end());
 236
 237                 // merge the empty par with the last par of the insertion
 238                 mergeParagraph(buffer.params(), pars,
 239                                pit + insertion.size() - 1);
 240         } else {
 241                 pars.insert(boost::next(pars.begin(), pit + 1),
 242                             insertion.begin(),
 243                             insertion.end());
 244
 245                 // merge the first par of the insertion with the current par
 246                 mergeParagraph(buffer.params(), pars, pit);
 247         }
 248
 249         pit_type last_paste = pit + insertion.size() - 1;
 250
 251         // Store the new cursor position.
 252         pit = last_paste;
 253         pos = pars[last_paste].size();
 254
 255         // Join (conditionally) last pasted paragraph with next one, i.e.,
 256         // the tail of the spliced document paragraph
 257         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 258                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 259                         mergeParagraph(buffer.params(), pars, last_paste);
 260                 } else if (pars[last_paste + 1].empty()) {
 261                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 262                         mergeParagraph(buffer.params(), pars, last_paste);
 263                 } else if (pars[last_paste].empty()) {
 264                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 265                         mergeParagraph(buffer.params(), pars, last_paste);
 266                 } else {
 267                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 268                         ++last_paste;
 269                 }
 270         }
 271
 272         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 273 }
 274
 275
 276 PitPosPair eraseSelectionHelper(BufferParams const & params,
 277         ParagraphList & pars,
 278         pit_type startpit, pit_type endpit,
 279         int startpos, int endpos)
 280 {
 281         // Start of selection is really invalid.
 282         if (startpit == pit_type(pars.size()) ||
 283             (startpos > pars[startpit].size()))
 284                 return PitPosPair(endpit, endpos);
 285
 286         // Start and end is inside same paragraph
 287         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 288                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 289                 return PitPosPair(endpit, endpos);
 290         }
 291
 292         for (pit_type pit = startpit; pit != endpit + 1;) {
 293                 pos_type const left  = (pit == startpit ? startpos : 0);
 294                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 295                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 296
 297                 // Logically erase only, including the end-of-paragraph character
 298                 pars[pit].eraseChars(left, right, params.trackChanges);
 299
 300                 // Separate handling of paragraph break:
 301                 if (merge && pit != endpit &&
 302                     (pit + 1 != endpit
 303                      || pars[pit].hasSameLayout(pars[endpit])
 304                      || pars[endpit].size() == endpos)) {
 305                         if (pit + 1 == endpit)
 306                                 endpos += pars[pit].size();
 307                         mergeParagraph(params, pars, pit);
 308                         --endpit;
 309                 } else
 310                         ++pit;
 311         }
 312
 313         // Ensure legal cursor pos:
 314         endpit = startpit;
 315         endpos = startpos;
 316         return PitPosPair(endpit, endpos);
 317 }
 318
 319
 320 void putClipboard(ParagraphList const & paragraphs,
 321         DocumentClass const * const docclass, docstring const & plaintext)
 322 {
 323         // For some strange reason gcc 3.2 and 3.3 do not accept
 324         // Buffer buffer(string(), false);
 325         Buffer buffer("", false);
 326         buffer.setUnnamed(true);
 327         buffer.paragraphs() = paragraphs;
 328         buffer.params().setDocumentClass(docclass);
 329         ostringstream lyx;
 330         if (buffer.write(lyx))
 331                 theClipboard().put(lyx.str(), plaintext);
 332         else
 333                 theClipboard().put(string(), plaintext);
 334 }
 335
 336
 337 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 338         pit_type startpit, pit_type endpit,
 339         int start, int end, DocumentClass const * const dc, CutStack & cutstack)
 340 {
 341         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 342         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 343         BOOST_ASSERT(startpit != endpit || start <= end);
 344
 345         // Clone the paragraphs within the selection.
 346         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 347                                 boost::next(pars.begin(), endpit + 1));
 348
 349         // Remove the end of the last paragraph; afterwards, remove the
 350         // beginning of the first paragraph. Keep this order - there may only
 351         // be one paragraph!  Do not track deletions here; this is an internal
 352         // action not visible to the user
 353
 354         Paragraph & back = copy_pars.back();
 355         back.eraseChars(end, back.size(), false);
 356         Paragraph & front = copy_pars.front();
 357         front.eraseChars(0, start, false);
 358
 359         ParagraphList::iterator it = copy_pars.begin();
 360         ParagraphList::iterator it_end = copy_pars.end();
 361
 362         for (; it != it_end; it++) {
 363                 // ERT paragraphs have the Language latex_language.
 364                 // This is invalid outside of ERT, so we need to change it
 365                 // to the buffer language.
 366                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 367                         it->changeLanguage(buf.params(), latex_language, buf.language());
 368                 }
 369                 it->setInsetOwner(0);
 370         }
 371
 372         // do not copy text (also nested in insets) which is marked as deleted
 373         acceptChanges(copy_pars, buf.params());
 374
 375         DocumentClass * d = const_cast<DocumentClass *>(dc);
 376         cutstack.push(make_pair(copy_pars, d));
 377 }
 378
 379 } // namespace anon
 380
 381
 382
 383
 384 namespace cap {
 385
 386 docstring grabAndEraseSelection(Cursor & cur)
 387 {
 388         if (!cur.selection())
 389                 return docstring();
 390         docstring res = grabSelection(cur);
 391         eraseSelection(cur);
 392         return res;
 393 }
 394
 395
 396 void switchBetweenClasses(DocumentClass const * const oldone,
 397                 DocumentClass const * const newone, InsetText & in, ErrorList & errorlist)
 398 {
 399         errorlist.clear();
 400
 401         BOOST_ASSERT(!in.paragraphs().empty());
 402         if (oldone == newone)
 403                 return;
 404
 405         DocumentClass const & oldtc = *oldone;
 406         DocumentClass const & newtc = *newone;
 407
 408         // layouts
 409         ParIterator end = par_iterator_end(in);
 410         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 411                 docstring const name = it->layout()->name();
 412                 bool hasLayout = newtc.hasLayout(name);
 413
 414                 if (in.useEmptyLayout())
 415                         it->setLayout(newtc.emptyLayout());
 416                 else if (hasLayout)
 417                         it->setLayout(newtc[name]);
 418                 else
 419                         it->setLayout(newtc.defaultLayout());
 420
 421                 if (!hasLayout && name != oldtc.defaultLayoutName()) {
 422                         docstring const s = bformat(
 423                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 424                                                 "because of class conversion from\n%3$s to %4$s"),
 425                          name, it->layout()->name(),
 426                          from_utf8(oldtc.name()), from_utf8(newtc.name()));
 427                         // To warn the user that something had to be done.
 428                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 429                                                       it->id(), 0,
 430                                                       it->size()));
 431                 }
 432         }
 433
 434         // character styles
 435         InsetIterator const i_end = inset_iterator_end(in);
 436         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 437                 InsetCollapsable * inset = it->asInsetCollapsable();
 438                 if (!inset)
 439                         continue;
 440                 if (inset->lyxCode() != FLEX_CODE)
 441                         // FIXME: Should we verify all InsetCollapsable?
 442                         continue;
 443                 inset->setLayout(newone);
 444                 if (!inset->undefined())
 445                         continue;
 446                 // The flex inset is undefined in newtc
 447                 docstring const s = bformat(_(
 448                         "Flex inset %1$s is "
 449                         "undefined because of class "
 450                         "conversion from\n%2$s to %3$s"),
 451                         inset->name(), from_utf8(oldtc.name()),
 452                         from_utf8(newtc.name()));
 453                 // To warn the user that something had to be done.
 454                 errorlist.push_back(ErrorItem(
 455                                 _("Undefined flex inset"),
 456                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 457         }
 458 }
 459
 460
 461 vector<docstring> availableSelections()
 462 {
 463         vector<docstring> selList;
 464
 465         CutStack::const_iterator cit = theCuts.begin();
 466         CutStack::const_iterator end = theCuts.end();
 467         for (; cit != end; ++cit) {
 468                 // we do not use cit-> here because gcc 2.9x does not
 469                 // like it (JMarc)
 470                 ParagraphList const & pars = (*cit).first;
 471                 docstring asciiSel;
 472                 ParagraphList::const_iterator pit = pars.begin();
 473                 ParagraphList::const_iterator pend = pars.end();
 474                 for (; pit != pend; ++pit) {
 475                         asciiSel += pit->asString(false);
 476                         if (asciiSel.size() > 25) {
 477                                 asciiSel.replace(22, docstring::npos,
 478                                                  from_ascii("..."));
 479                                 break;
 480                         }
 481                 }
 482
 483                 selList.push_back(asciiSel);
 484         }
 485
 486         return selList;
 487 }
 488
 489
 490 size_type numberOfSelections()
 491 {
 492         return theCuts.size();
 493 }
 494
 495
 496 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 497 {
 498         // This doesn't make sense, if there is no selection
 499         if (!cur.selection())
 500                 return;
 501
 502         // OK, we have a selection. This is always between cur.selBegin()
 503         // and cur.selEnd()
 504
 505         if (cur.inTexted()) {
 506                 Text * text = cur.text();
 507                 BOOST_ASSERT(text);
 508
 509                 saveSelection(cur);
 510
 511                 // make sure that the depth behind the selection are restored, too
 512                 cur.recordUndoSelection();
 513                 pit_type begpit = cur.selBegin().pit();
 514                 pit_type endpit = cur.selEnd().pit();
 515
 516                 int endpos = cur.selEnd().pos();
 517
 518                 BufferParams const & bp = cur.buffer().params();
 519                 if (realcut) {
 520                         copySelectionHelper(cur.buffer(),
 521                                 text->paragraphs(),
 522                                 begpit, endpit,
 523                                 cur.selBegin().pos(), endpos,
 524                                 bp.documentClassPtr(), theCuts);
 525                         // Stuff what we got on the clipboard.
 526                         // Even if there is no selection.
 527                         putClipboard(theCuts[0].first, theCuts[0].second,
 528                                 cur.selectionAsString(true));
 529                 }
 530
 531                 boost::tie(endpit, endpos) =
 532                         eraseSelectionHelper(bp,
 533                                 text->paragraphs(),
 534                                 begpit, endpit,
 535                                 cur.selBegin().pos(), endpos);
 536
 537                 // cutSelection can invalidate the cursor so we need to set
 538                 // it anew. (Lgb)
 539                 // we prefer the end for when tracking changes
 540                 cur.pos() = endpos;
 541                 cur.pit() = endpit;
 542
 543                 // sometimes necessary
 544                 if (doclear
 545                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 546                         cur.fixIfBroken();
 547
 548                 // need a valid cursor. (Lgb)
 549                 cur.clearSelection();
 550                 updateLabels(cur.buffer());
 551
 552                 // tell tabular that a recent copy happened
 553                 dirtyTabularStack(false);
 554         }
 555
 556         if (cur.inMathed()) {
 557                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 558                         // The current selection spans more than one cell.
 559                         // Record all cells
 560                         cur.recordUndoInset();
 561                 } else {
 562                         // Record only the current cell to avoid a jumping
 563                         // cursor after undo
 564                         cur.recordUndo();
 565                 }
 566                 if (realcut)
 567                         copySelection(cur);
 568                 eraseSelection(cur);
 569         }
 570 }
 571
 572
 573 void copySelection(Cursor & cur)
 574 {
 575         copySelection(cur, cur.selectionAsString(true));
 576 }
 577
 578
 579 namespace {
 580
 581 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 582 {
 583         // this doesn't make sense, if there is no selection
 584         if (!cur.selection())
 585                 return;
 586
 587         // copySelection can not yet handle the case of cross idx selection
 588         if (cur.selBegin().idx() != cur.selEnd().idx())
 589                 return;
 590
 591         if (cur.inTexted()) {
 592                 Text * text = cur.text();
 593                 BOOST_ASSERT(text);
 594                 // ok we have a selection. This is always between cur.selBegin()
 595                 // and sel_end cursor
 596
 597                 // copy behind a space if there is one
 598                 ParagraphList & pars = text->paragraphs();
 599                 pos_type pos = cur.selBegin().pos();
 600                 pit_type par = cur.selBegin().pit();
 601                 while (pos < pars[par].size() &&
 602                        pars[par].isLineSeparator(pos) &&
 603                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 604                         ++pos;
 605
 606                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 607                         pos, cur.selEnd().pos(),
 608                         cur.buffer().params().documentClassPtr(), cutstack);
 609                 dirtyTabularStack(false);
 610         }
 611
 612         if (cur.inMathed()) {
 613                 //lyxerr << "copySelection in mathed" << endl;
 614                 ParagraphList pars;
 615                 Paragraph par;
 616                 BufferParams const & bp = cur.buffer().params();
 617                 // FIXME This should be the empty layout...right?
 618                 par.setLayout(bp.documentClass().emptyLayout());
 619                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 620                 pars.push_back(par);
 621                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 622         }
 623 }
 624
 625 }
 626
 627
 628 void copySelectionToStack()
 629 {
 630         if (!selectionBuffer.empty())
 631                 theCuts.push(selectionBuffer[0]);
 632 }
 633
 634
 635 void copySelection(Cursor & cur, docstring const & plaintext)
 636 {
 637         // In tablemode, because copy and paste actually use special table stack
 638         // we do not attempt to get selected paragraphs under cursor. Instead, a
 639         // paragraph with the plain text version is generated so that table cells
 640         // can be pasted as pure text somewhere else.
 641         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 642                 ParagraphList pars;
 643                 Paragraph par;
 644                 BufferParams const & bp = cur.buffer().params();
 645                 par.setLayout(bp.documentClass().emptyLayout());
 646                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 647                 pars.push_back(par);
 648                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
 649         } else {
 650                 copySelectionToStack(cur, theCuts);
 651         }
 652
 653         // stuff the selection onto the X clipboard, from an explicit copy request
 654         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 655 }
 656
 657
 658 void saveSelection(Cursor & cur)
 659 {
 660         // This function is called, not when a selection is formed, but when
 661         // a selection is cleared. Therefore, multiple keyboard selection
 662         // will not repeatively trigger this function (bug 3877).
 663         if (cur.selection()
 664             && cur.selBegin() == cur.bv().cursor().selBegin()
 665             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 666                 LYXERR(Debug::ACTION, "'" << cur.selectionAsString(true) << "'");
 667                 copySelectionToStack(cur, selectionBuffer);
 668         }
 669 }
 670
 671
 672 bool selection()
 673 {
 674         return !selectionBuffer.empty();
 675 }
 676
 677
 678 void clearSelection()
 679 {
 680         selectionBuffer.clear();
 681 }
 682
 683
 684 void clearCutStack()
 685 {
 686         theCuts.clear();
 687 }
 688
 689
 690 docstring selection(size_t sel_index)
 691 {
 692         return sel_index < theCuts.size()
 693                 ? theCuts[sel_index].first.back().asString(false)
 694                 : docstring();
 695 }
 696
 697
 698 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 699                         DocumentClass const * const docclass, ErrorList & errorList)
 700 {
 701         if (cur.inTexted()) {
 702                 Text * text = cur.text();
 703                 BOOST_ASSERT(text);
 704
 705                 pit_type endpit;
 706                 PitPosPair ppp;
 707
 708                 boost::tie(ppp, endpit) =
 709                         pasteSelectionHelper(cur, parlist, docclass, errorList);
 710                 updateLabels(cur.buffer());
 711                 cur.clearSelection();
 712                 text->setCursor(cur, ppp.first, ppp.second);
 713         }
 714
 715         // mathed is handled in InsetMathNest/InsetMathGrid
 716         BOOST_ASSERT(!cur.inMathed());
 717 }
 718
 719
 720 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 721 {
 722         // this does not make sense, if there is nothing to paste
 723         if (!checkPastePossible(sel_index))
 724                 return;
 725
 726         cur.recordUndo();
 727         pasteParagraphList(cur, theCuts[sel_index].first,
 728                            theCuts[sel_index].second, errorList);
 729         cur.setSelection();
 730 }
 731
 732
 733 void pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 734 {
 735         // Use internal clipboard if it is the most recent one
 736         if (theClipboard().isInternal()) {
 737                 pasteFromStack(cur, errorList, 0);
 738                 return;
 739         }
 740
 741         // First try LyX format
 742         if (theClipboard().hasLyXContents()) {
 743                 string lyx = theClipboard().getAsLyX();
 744                 if (!lyx.empty()) {
 745                         // For some strange reason gcc 3.2 and 3.3 do not accept
 746                         // Buffer buffer(string(), false);
 747                         Buffer buffer("", false);
 748                         buffer.setUnnamed(true);
 749                         if (buffer.readString(lyx)) {
 750                                 cur.recordUndo();
 751                                 pasteParagraphList(cur, buffer.paragraphs(),
 752                                         buffer.params().documentClassPtr(), errorList);
 753                                 cur.setSelection();
 754                                 return;
 755                         }
 756                 }
 757         }
 758
 759         // Then try plain text
 760         docstring const text = theClipboard().getAsText();
 761         if (text.empty())
 762                 return;
 763         cur.recordUndo();
 764         if (asParagraphs)
 765                 cur.text()->insertStringAsParagraphs(cur, text);
 766         else
 767                 cur.text()->insertStringAsLines(cur, text);
 768 }
 769
 770
 771 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
 772                             Clipboard::GraphicsType preferedType)
 773 {
 774         BOOST_ASSERT(theClipboard().hasGraphicsContents(preferedType));
 775
 776         // get picture from clipboard
 777         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
 778         if (filename.empty())
 779                 return;
 780
 781         // create inset for graphic
 782         InsetGraphics * inset = new InsetGraphics;
 783         InsetGraphicsParams params;
 784         params.filename = EmbeddedFile(filename.absFilename(), cur.buffer().filePath());
 785         inset->setParams(params);
 786         cur.recordUndo();
 787         cur.insert(inset);
 788 }
 789
 790
 791 void pasteSelection(Cursor & cur, ErrorList & errorList)
 792 {
 793         if (selectionBuffer.empty())
 794                 return;
 795         cur.recordUndo();
 796         pasteParagraphList(cur, selectionBuffer[0].first,
 797                            selectionBuffer[0].second, errorList);
 798 }
 799
 800
 801 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 802 {
 803         cur.recordUndo();
 804         DocIterator selbeg = cur.selectionBegin();
 805
 806         // Get font setting before we cut
 807         Font const font =
 808                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 809
 810         // Insert the new string
 811         pos_type pos = cur.selEnd().pos();
 812         Paragraph & par = cur.selEnd().paragraph();
 813         docstring::const_iterator cit = str.begin();
 814         docstring::const_iterator end = str.end();
 815         for (; cit != end; ++cit, ++pos)
 816                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 817
 818         // Cut the selection
 819         cutSelection(cur, true, false);
 820
 821         // select the replacement
 822         if (backwards) {
 823                 selbeg.pos() += str.length();
 824                 cur.setSelection(selbeg, -int(str.length()));
 825         } else
 826                 cur.setSelection(selbeg, str.length());
 827 }
 828
 829
 830 void replaceSelection(Cursor & cur)
 831 {
 832         if (cur.selection())
 833                 cutSelection(cur, true, false);
 834 }
 835
 836
 837 void eraseSelection(Cursor & cur)
 838 {
 839         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 840         CursorSlice const & i1 = cur.selBegin();
 841         CursorSlice const & i2 = cur.selEnd();
 842         if (i1.inset().asInsetMath()) {
 843                 saveSelection(cur);
 844                 cur.top() = i1;
 845                 if (i1.idx() == i2.idx()) {
 846                         i1.cell().erase(i1.pos(), i2.pos());
 847                         // We may have deleted i1.cell(cur.pos()).
 848                         // Make sure that pos is valid.
 849                         if (cur.pos() > cur.lastpos())
 850                                 cur.pos() = cur.lastpos();
 851                 } else {
 852                         InsetMath * p = i1.asInsetMath();
 853                         Inset::row_type r1, r2;
 854                         Inset::col_type c1, c2;
 855                         region(i1, i2, r1, r2, c1, c2);
 856                         for (Inset::row_type row = r1; row <= r2; ++row)
 857                                 for (Inset::col_type col = c1; col <= c2; ++col)
 858                                         p->cell(p->index(row, col)).clear();
 859                         // We've deleted the whole cell. Only pos 0 is valid.
 860                         cur.pos() = 0;
 861                 }
 862                 // need a valid cursor. (Lgb)
 863                 cur.clearSelection();
 864         } else {
 865                 lyxerr << "can't erase this selection 1" << endl;
 866         }
 867         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 868 }
 869
 870
 871 void selDel(Cursor & cur)
 872 {
 873         //lyxerr << "cap::selDel" << endl;
 874         if (cur.selection())
 875                 eraseSelection(cur);
 876 }
 877
 878
 879 void selClearOrDel(Cursor & cur)
 880 {
 881         //lyxerr << "cap::selClearOrDel" << endl;
 882         if (lyxrc.auto_region_delete)
 883                 selDel(cur);
 884         else
 885                 cur.selection() = false;
 886 }
 887
 888
 889 docstring grabSelection(Cursor const & cur)
 890 {
 891         if (!cur.selection())
 892                 return docstring();
 893
 894         // FIXME: What is wrong with the following?
 895 #if 0
 896         ostringstream os;
 897         for (DocIterator dit = cur.selectionBegin();
 898              dit != cur.selectionEnd(); dit.forwardPos())
 899                 os << asString(dit.cell());
 900         return os.str();
 901 #endif
 902
 903         CursorSlice i1 = cur.selBegin();
 904         CursorSlice i2 = cur.selEnd();
 905
 906         if (i1.idx() == i2.idx()) {
 907                 if (i1.inset().asInsetMath()) {
 908                         MathData::const_iterator it = i1.cell().begin();
 909                         return asString(MathData(it + i1.pos(), it + i2.pos()));
 910                 } else {
 911                         return from_ascii("unknown selection 1");
 912                 }
 913         }
 914
 915         Inset::row_type r1, r2;
 916         Inset::col_type c1, c2;
 917         region(i1, i2, r1, r2, c1, c2);
 918
 919         docstring data;
 920         if (i1.inset().asInsetMath()) {
 921                 for (Inset::row_type row = r1; row <= r2; ++row) {
 922                         if (row > r1)
 923                                 data += "\\\\";
 924                         for (Inset::col_type col = c1; col <= c2; ++col) {
 925                                 if (col > c1)
 926                                         data += '&';
 927                                 data += asString(i1.asInsetMath()->
 928                                         cell(i1.asInsetMath()->index(row, col)));
 929                         }
 930                 }
 931         } else {
 932                 data = from_ascii("unknown selection 2");
 933         }
 934         return data;
 935 }
 936
 937
 938 void dirtyTabularStack(bool b)
 939 {
 940         dirty_tabular_stack_ = b;
 941 }
 942
 943
 944 bool tabularStackDirty()
 945 {
 946         return dirty_tabular_stack_;
 947 }
 948
 949
 950 } // namespace cap
 951
 952 } // namespace lyx